Vitamin Water

I had a Vitamin Water the other day and they have little stories or things written on the side. Mine claimed all kinds of things about how amazing Vitamin Water is and exaggerated it's abilities greatly, and then at the end they admitted to exaggerating and said that they were really just trying to make a lame attempt at selling their product. I've noticed things like this on other products as well and I think that the strategy they are using is interesting. Are they trying to capture customers on the humor aspect of it? Are they trying to get people to trust them because of their honesty?